91983061 has 2 divisors, whose sum is σ = 91983062. Its totient is φ = 91983060.

The previous prime is 91983011. The next prime is 91983083. The reversal of 91983061 is 16038919.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91584900 + 398161 = 9570^2 + 631^2 .

It is a cyclic number.

It is not a de Polignac number, because 91983061 - 2¹⁵ = 91950293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91983061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91983011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45991530 + 45991531.

It is an arithmetic number, because the mean of its divisors is an integer number (45991531).

Almost surely, 2^91983061 is an apocalyptic number.

It is an amenable number.

91983061 is a deficient number, since it is larger than the sum of its proper divisors (1).

91983061 is an equidigital number, since it uses as much as digits as its factorization.

91983061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 91983061 is about 9590.7799995621. The cubic root of 91983061 is about 451.4080357959.

The spelling of 91983061 in words is "ninety-one million, nine hundred eighty-three thousand, sixty-one".